Just uploaded a very minor update to Inner System Blues for a couple tiny wording choices and a correction to the cover so the text looks more like I intended. Just in case I'm not the only one who's been having with exporting to PDF from Affinity Publisher, I figured I'll share what I did.

Here's a before and after of the logo:

It was even more noticeable on the CTRL cover, where the "CTRL" text showed up in faded red when exported to JPG but light orange when  exported to PDF. So what happened?

Searching online for this will turn up a bunch of pages that indicate it's a problem with mismatched color profiles with placed images, but mucking with those settings had no effect on PDF exports—it only changed how things looked on screen. Rather, the issue was with vector objects—i.e., text and shapes—that have layer blend modes. (The text is set to "Hard Light" on Inner System Blues, "Color Dodge" on Cosmic Highway, and "Color Burn" on CTRL.)

The only fix I could figure out was to rasterize and merge everything. I still wanted the text to be text, though, so it could be copied from PDFs and the like, so I did the following: 

1. Switched to Affinity Photo profile (requires Affinity Photo app, not just Publisher)
2. Copied all the text, pasted it, and moved it to bottom layer so it would be effectively hidden but still searchable
3. Copied the background image and stuck that in the back just so I have the text-free version handy if ever needed
4. Rotated text and background 90° so rasterizing wouldn't cut off content outside the art board (as I leave ⅛ inch all around in case I want to print it with full bleed someday)
5. Right-clicked on text layers and chose "Rasterize"
6. Clicked on each text layer one by one, went to Layer menu, and chose "Merge Down" into background underneath
7. Rotated back and lined up with copied background so it looks the same as before

Kind of a pain in the butt! But now you see the same cover I see. Hope you'll agree it looks nicer!